Removal of Acid Red 88 Using Activated Carbon Produced from Pomelo Peels by KOH Activation: Orthogonal Experiment, Isotherm, and Kinetic Studies

Table 6

Adsorption kinetics parameters.

C0 (mg/l)	Pseudo-first-order model				Pseudo-second-order model				Intraparticle diffusion model
	qe,exp (mg/g)	qe,cal (mg/g)	k1 (1/min)	R^2	qe,exp (mg/g)	qe,cal (mg/g)	k2 (g/mg·min)	R^2	qe,exp (mg/g)	C (mg/g)	k3 (mg/g·min^1/2)	R^2
200	594.51	30.94	0.00739	0.7186	594.51	597.59	0.00056	0.9999	594.51	532.65	3.3689	0.5720
400	1188.33	525.32	0.0161	0.8859	1188.33	1247.50	0.000044	0.9989	1188.33	716.59	26.025	0.7749
600	1487.40	1430.82	0.0160	0.9389	1487.40	1586.29	0.000023	0.9988	1487.40	823.72	35.135	0.9142